(S)-2-Methoxy-1-phenylethanamine → (2R)-2-[(4S)-2,2-dimethyl-5-oxo-1,3-dioxolan-4-yl]-N-[(1S)-2,2-dimethyl-1-({[(1S)-2-methoxy-1-phenylethyl]amino}carbonyl)propyl]-5-[(3'-methoxy-2-methylbiphen-4-yl)propyl]pentanamide

HRID 1700970Notes

Reaction equation

HRID 1700970 reaction equation
[C:1]([C@@H:4]([NH:9][C:10](=[O:41])[C@@H:11]([C@H:33]1[C:37](=[O:38])[O:36][C:35]([CH3:40])([CH3:39])[O:34]1)[CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][C:18]1[CH:23]=[C:22]([CH3:24])[C:21]([C:25]2[CH:30]=[CH:29][CH:28]=[C:27]([O:31][CH3:32])[CH:26]=2)=[CH:20][CH:19]=1)[C:5]([CH3:8])([CH3:7])[CH3:6])(O)=[O:2].[CH3:42][O:43][CH2:44][C@@H:45]([NH2:52])[C:46]1[CH:51]=[CH:50][CH:49]=[CH:48][CH:47]=1>C(OCC)(=O)C>[CH3:39][C:35]1([CH3:40])[O:34][C@@H:33]([C@@H:11]([CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][C:18]2[CH:23]=[C:22]([CH3:24])[C:21]([C:25]3[CH:30]=[CH:29][CH:28]=[C:27]([O:31][CH3:32])[CH:26]=3)=[CH:20][CH:19]=2)[C:10]([NH:9][C@H:4]([C:1]([NH:52][C@@H:45]([C:46]2[CH:51]=[CH:50][CH:49]=[CH:48][CH:47]=2)[CH2:44][O:43][CH3:42])=[O:2])[C:5]([CH3:6])([CH3:7])[CH3:8])=[O:41])[C:37](=[O:38])[O:36]1

Participants

4

Reactant 2

HCID 11768756(S)-2-Methoxy-1-phenylethanamineHCID 131723127(2R)-N-[(1S)-1-(carboxy)-2,2-dimethylpropyl]-2-[(4S)-2,2-dimethyl-5-oxo-1,3-dioxolan-4-yl]-5-[(3'-methoxy-2-methylbiphen-4-yl)propyl]pentanamide

Product 1

HCID 131723128(2R)-2-[(4S)-2,2-dimethyl-5-oxo-1,3-dioxolan-4-yl]-N-[(1S)-2,2-dimethyl-1-({[(1S)-2-methoxy-1-phenylethyl]amino}carbonyl)propyl]-5-[(3'-methoxy-2-methylbiphen-4-yl)propyl]pentanamideYield 69%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

According to the method of Example 25(a), (2R)-N-[(1S)1-(carboxy)-2,2-dimethylpropyl]-2-[(4S)-2,2-dimethyl-5-oxo-1,3-dioxolan-4-yl]-5-[(3′-methoxy-2-methylbiphen-4-yl)propyl]pentanamide (Preparation 34)(220 mg, 0.42 mmol) was reacted with (1S)-2-methoxy-1-phenylethylamine (63 mg, 0.42 mmol) at room temperature for 2.5 h. The mixture was poured into ethyl acetate (75 mL) and washed with 0.5M aqueous sodium dihydrogenphosphate (2×50 mL) and 5% aqueous sodium bicarbonate (50 mL)(solid sodium chloride was added to give phase separation). The organic solution was dried (Na2SO4) and concentrated under reduced pressure. The residue was purified by flash chromatography (gradient elution with hexane:ethyl acetate=30:70 to 60:40) to give a white solid which was purified again by flash chromatography (sorbsil C60, (20-40μ) silica gel, eluting with hexane:ethyl acetate 35:65) to give (2R)-2-[(4S)-2,2-dimethyl-5-oxo-1,3-dioxolan-4-yl]-N-[(1S)-2,2-dimethyl-1-({[(1S)-2-methoxy-1-phenylethyl]amino}carbonyl)propyl]-5-[(3′-methoxy-2-methylbiphen-4-yl)propyl]pentanamide as a white solid (191 mg, 69%).

Workup

  1. washwashed with 0.5M aqueous sodium dihydrogenphosphate (2×50 mL) and 5% aqueous sodium bicarbonate (50 mL)(solid sodium chloride was added to give phase separation)
  2. dry with materialThe organic solution was dried (Na2SO4)
  3. concentrationconcentrated under reduced pressure
  4. customThe residue was purified by flash chromatography (gradient elution with hexane:ethyl acetate=30:70 to 60:40)
  5. customto give a white solid which
  6. customwas purified again by flash chromatography (sorbsil C60, (20-40μ) silica gel, eluting with hexane:ethyl acetate 35:65)

Sources & evidence

ORD record
ord-875aaf0b7e184b7f9f49c52fe8138c6f
Source dataset
uspto-grants-2002_02
Patent number
US06350907B1

Reaction notes

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